青海省红旗沟金矿矿石特征及矿床成因

Ore characteristic and genesis of Hongqigou Gold Deposit in Qinghai Province

在野外地质调查和光(薄)片镜下鉴定基础上,对红旗沟金矿床的矿石组构特征进行了详细研究。矿石组构类型较简单,自下而上呈有规律变化,是特殊成岩成矿作用的必然结果。矿石构造主要有浸染状构造,其次为细脉状构造及角砾状构造。矿石结构以它形粒状结构、自形—它形粒状结构及包含结构为主。以矿石组构研究成果为基础,明确矿物共生组合关系及生成顺序后,结合前人研究资料,将该矿床成矿期大致分为热液期和表生氧化期,主要成矿期为热液期,划分为硫化物阶段、碳酸盐阶段、氧化物阶段。最终确定红旗沟金矿为受构造及岩浆活动影响的中低温热液型矿床。

Based on the field geological survey and the identification of light （thin） sheet,the ore structure characteristics of Hongqigou gold deposit were studied in detail.The regular change of the ore fabric from the bottom to top in the orebody was the inevitable results of the special diagenesis-mineralization.Ore structure were mainly disseminated,followed by fine vein structure and brecciated structure.Ore texture were mainly its granular texture,the shape-it contains form granular texture.Based on the research results of ore structure,the mineralization period of the deposit was divided into hydrothermal period and epoxidation stage,and the main mineralization period was hydrothermal period,divided into sulfide stage,carbonate stage,oxide stage.According to the ore fabric study,the genesis type of the Hongqigou gold deposit is the magmatic hydrothermal deposit.